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<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
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<body>
  <script>
    // 输入2个数，计算两者的和，打印到页面中
    let num1 = +prompt("请输入第一个数字：")
    let num2 = +prompt("请输入第二个数字：")
    alert(`两个数相加的和是：${num1 + num2}`)
  </script>
</body>

</html>